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# Diffraction of Light: Diffraction Grating

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1. A diffraction grating with 2.10E3 slits per centimeter is used to measure the wavelengths emitted by hydrogen gas.
At what angles in the first-order spectrum would you expect to find the two violet lines of wavelengths 434 nm
and 410 nm?
(a) At what angle in the first-order spectrum would you expect to find the first violet line of wavelengths
434 nm?
(b) At what angle in the first-order spectrum would you expect to find the second violet line of
wavelength 410 nm?

2. What is the longest wavelength that can be observed in the fifth-order (m=5) spectrum using a diffraction grating with
3.60E3 slits per centimeter? (Unit: nm)
All answers must have three significant digits unless otherwise specified.

https://brainmass.com/physics/light-diffraction/diffraction-light-diffraction-grating-34665

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1. For a diffraction grating if a is the width of the slit and b is the width of the line (opaque) then the ...

#### Solution Summary

Two problem related to the calculation for the angle of first order and other maxima.

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